CONTENTS 
OF VOL. 161. 
PART I. 
1. Chemical and Physiological Experiments on living Cinchonas. By J. Broughton, B.Sc., 
F.C.S., Chemist to the Cinchona-Plantations of the Madras Government. Commu- 
nicated by Dr. E. Frankland, F.R.S page 1 
II. A Ninth Memoir on Quantics. By Professor Cayley, F.R.S 17 
III. On Supersaturated Saline Solutions. — Part II. By Charles Tomlinson, F.R.S. 51 
IV. Magnetic Observations made at Stotiy hurst College Observatory , from April I 860 to 
March 1870. By the Rev. S. J. Perry. Communicated by the President. . 69 
V. On the Theory of Resonance. By the Hon. J. W. Strutt, M.A., Fellow of Trinity 
College , Cambridge. Communicated by W. Spottiswoode, F.R.S. ... 77 
VI. On the Formation of some of the Subaxial Arches in Man. By George W. 
Callender, Assistant- Surgeon to and Lecturer on Anatomy at St. Bartholomew s 
Hospital. Communicated by J. Paget, F.R.S 119 
VII. Polarization of Metallic Surfaces in Aqueous Solutions. On a new Method of 
obtaining Electricity from Mechanical Force , and certain relations between Elec- 
trostatic Induction and the Decomposition of Water. By Cromwell Fleetwood 
Varley. Communicated by Sir W. Thomson, F.R.S. ....... 129 
VIII. On the Structure and Development of the Skull of the Common Frog (Rana tempo- 
raria, L.). By William Kitchen Parker, F.R.S 137 
IX. On the Fossil Mammals of Australia. — Part IV. Dentition and Mandible of Thy- 
lacoleo carnifex, with remarks on the arguments for its Herbivority. By Professor 
Owen, F.R.S. &c. . . 213 
PART II. 
X. On the Mathematical Theory of Stream-lines , especially those with four Foci and 
upwards. By William John Macquorn Rankine, C.E., LL.D., F.R.SS. Bond. 
& Edin., &c. 267 
